XenSource Xen 4.2/4.3/4.4/4.5 GNTTABOP_swap_grant_ref null pointer dereference

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2.9$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in XenSource Xen 4.2/4.3/4.4/4.5. This affects the function GNTTABOP_swap_grant_ref. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2015-4163. There is no available exploit. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability classified as problematic was found in XenSource Xen 4.2/4.3/4.4/4.5 (Virtualization Software). Affected by this vulnerability is the function GNTTABOP_swap_grant_ref. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was presented 06/11/2015 by Jan Beulich with SuSE as XSA-134 as confirmed security advisory (Website). The advisory is shared at xenbits.xen.org. This vulnerability is known as CVE-2015-4163 since 06/02/2015. An attack has to be approached locally. The successful exploitation needs a single authentication. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 84169 (Debian DSA-3286-1 : xen - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370035 (Citrix XenServer Security Update (CTX201145)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at xenbits.xen.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (103787), Tenable (84169), SecurityFocus (BID 75141†), SecurityTracker (ID 1032568†) and Vulnerability Center (SBV-50587†). See VDB-74497, VDB-75680, VDB-75681 and VDB-75682 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 2.9

VulDB Base Score: 3.3
VulDB Temp Score: 2.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 84169
Nessus Name: Debian DSA-3286-1 : xen - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703286
OpenVAS Name: Debian Security Advisory DSA 3286-1 (xen - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: xenbits.xen.org

Timelineinfo

06/02/2015 🔍
06/11/2015 +9 days 🔍
06/11/2015 +0 days 🔍
06/11/2015 +0 days 🔍
06/12/2015 +1 days 🔍
06/12/2015 +0 days 🔍
06/15/2015 +3 days 🔍
06/15/2015 +0 days 🔍
06/15/2015 +0 days 🔍
06/16/2015 +1 days 🔍
05/21/2022 +2530 days 🔍

Sourcesinfo

Vendor: citrix.com

Advisory: XSA-134
Researcher: Jan Beulich
Organization: SuSE
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-4163 (🔍)
GCVE (CVE): GCVE-0-2015-4163
GCVE (VulDB): GCVE-100-75853

OVAL: 🔍

X-Force: 103787 - Xen GNTTABOP_swap_grant_ref denial of service
SecurityFocus: 75141 - Xen CVE-2015-4163 Local Denial of Service Vulnerability
SecurityTracker: 1032568
Vulnerability Center: 50587 - Xen 4.2 through 4.5 Local DoS via a Hypercall without a GNTTABOP_setup_table or GNTTABOP_set_version, Medium

See also: 🔍

Entryinfo

Created: 06/12/2015 10:50
Updated: 05/21/2022 01:16
Changes: 06/12/2015 10:50 (76), 06/26/2018 08:46 (10), 05/21/2022 01:16 (3)
Complete: 🔍
Cache ID: 216:C80:103

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